AVES FALCONID^. 



629 



Similar to the adult male in color, but much larger in every way ; the 

 greater coverts smoky blue-black, immaculate ; the breast band and inter- 

 scapular region without the white tips to the points of the dark feathers ; 



Fig. 318. 



Bi(t£o melanoleucus. P. U. O. C. 7886. Immature plumage. One-fifth natural size. 



all the smoky blue-black color deeper in tone and richer, nearer to black. 

 Length 32.00; wing 25.0; tail 13.0 inches. 



Young of the year and immature birds: No. 7886, P. U. O. C, Coy 

 Inlet, Patagonia (southeastern), 12 November, 1896, J. B. Hatcher. Gen- 



